US4298087A - Unidirectional speaker enclosure - Google Patents

Unidirectional speaker enclosure Download PDF

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Publication number
US4298087A
US4298087A US06/066,539 US6653979A US4298087A US 4298087 A US4298087 A US 4298087A US 6653979 A US6653979 A US 6653979A US 4298087 A US4298087 A US 4298087A
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United States
Prior art keywords
aperture
chamber
speaker
casing
speaker enclosure
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Expired - Lifetime
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US06/066,539
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English (en)
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Dominique Launay
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers

Definitions

  • This invention relates in general to speaker enclosures or systems and has specific reference to a unidirectional speaker enclosure or system.
  • a speaker system comprises as a rule a support and at least one transducer, notably a loudspeaker, secured to the support and having the front face of its membrane directed towards an aperture of the support.
  • the first method is directed to deaden the backward wave in order to reduce the negative and detrimental effect produced thereby on the front or forward wave.
  • the other method aims at transforming or "handling" the backward wave in such a manner that it will reinforce, or at least not interfere with, the forward wave.
  • One way of implementing the first method consists in constructing a so-called "infinite" speaker enclosure in which the support structure consists essentially of a rigid cabinet or box provided with a single front aperture registering with the front face of the speaker membrane, the box being otherwise tightly closed.
  • the support structure consists essentially of a rigid cabinet or box provided with a single front aperture registering with the front face of the speaker membrane, the box being otherwise tightly closed.
  • this solution is not fully satisfactory.
  • any membrane movement is attended by a variation in the pressure of the air contained in the box, thus urging the membrane in the direction opposite its normal movement, so that the membrane undergoes a certain damping effect.
  • the greater the amplitude of the membrane movement the higher this damping effect, this greater amplitude corresponding of course to the low-frequency range of operation of the speaker.
  • a first form of embodiment comprises an enclosure of which the support consists of a flat member having its free edge spaced from the loudspeaker by a distance corresponding substantially to one-half of the wavelength of the sensitive frequency, so that the back wave attaining the front portion of the enclosure is delayed in relation to the front wave to an extent corresponding to one wavelength.
  • the enclosure radiates the sound in all directions.
  • the speaker enclosure proper is also expensive, cumbersome, heavy, and in many cases has a complex configuration ill suited for the use normally contemplated for a loudspeaker enclosure or system.
  • the direction or directions and sense of the backward wave radiation do not correspond necessarily to the direction and sense of the forward wave, so that the speaker system is in most instances non-directive or still multi-directional.
  • unidirectional speaker enclosures i.e. having a single direction and a single sense of sound radiation, in lieu of multi-directional or non-directional speaker enclosures, is required.
  • speaker systems of the so-called infinite type and also of the flat type are not capable of producing this unidirectional sound radiation.
  • Speaker enclosures of the bass reflex type are also either ill-suited, since the backward wave is transmitted in a direction or a sense other than those of the forward wave, or unsatisfactory since the backward wave channelling means have the above-mentioned inconveniences.
  • the present invention is therefore directed to avoiding these inconveniences by providing a unidirectional speaker enclosure of reduced overall dimensions, which is simple in design, has a minimum weight and a shape permitting its normal use under any desired conditions.
  • the unidirectional speaker enclosure which comprises a cabinet or casing and at least one loudspeaker secured to the cabinet and having the front face of its membrane directed towards a main aperture of the cabinet, is characterized in that the cabinet is rigid and has a cylindrical configuration, and further comprises a single secondary aperture located in close proximity of the main aperture; and rigid partition means disposed within the cabinet for forming therein a chamber for channelling the air between the rear face of the speaker membrane and the secondary aperture.
  • FIG. 1 is a diagrammatic axial section showing an exemplary form of embodiment of a speaker enclosure according to this invention.
  • FIG. 2 is a diagrammatic cross section taken along the plane II--II of FIG. 1.
  • the unidirectional speaker enclosure comprises a cabinet or box 1 and at least one transducer, notably a loudspeaker 2, secured to the cabinet 1.
  • This cabinet 1 has a general straight cylindrical configuration of revolution about an axis 3, with a circular base.
  • This axis 3 is in fact an axis of revolution and also of symmetry for the complete speaker enclosure.
  • the cabinet 1 has a cylindrical lateral surface 4, a circular bottom 5 at its rear end and a front wall 6 at the front end of cabinet 1.
  • the cabinet structure namely its lateral cylindrical wall 4, its bottom 5 and its front wall 6 are made of an extremely rigid and therefore distortion-free material, notably plastics, in order to prevent any cabinet vibration by acoustic resonance.
  • the front wall 6 has formed therein a first or main concentric aperture 7 and a second annular peripheral secondary aperture 8 concentric to the main aperture 7.
  • the first aperture 7 is generally circular and has a radius R 1 limited by an external edge 9.
  • the second aperture 8 is generally annular and defined by an inner circular edge 10 having a radius R 2 , and by an outer circular edge 11 having a radius R 3 .
  • the outer circular edge 11 is coincident with, or located in close vicinity of, the lateral face 4, so that the radius R 3 is equal or close to the radius R 4 of the lateral face 4.
  • the front wall has the general shape of an annular ring having an axis 3 and is bound internally by the edge 9 and externally by the edge 10.
  • the second aperture 8 lies in close vicinity of the first aperture 7, so that the radius R 2 is close to, or differs slightly from, the radius R 1 , and the annular portion constituting the front wall 6 has a reduced radial width in comparison with the radial dimension of the complete cabinet 1.
  • the construction of the cabinet 1 in the form of a cylinder imparts a maximum rigidity to this structure.
  • the loudspeaker 2 of a type known per se, comprises a moving element 12 shown only diagrammatically, which is housed in the cabinet 1 and provided with lead-in wires (not shown) emerging from any suitable portion of the cabinet 1, notably through its bottom 5, and also a deformable membrane 13 of exponential configuration, having the same axis 3 as the cabinet proper, the major aperture 14 of this loudspeaker being located very close to the first aperture 7 which consequently lies adjacent the front face 15 of membrane 13.
  • the first aperture 7 corresponds to the aperture 14 of membrane 13, and to this end the edge 9 of the first aperture 7 is preferably inclined, as illustrated in FIG. 1, so as to constitute substantially an extension of the membrane 13.
  • the loudspeaker 2 is secured directly or indirectly to the cabinet 1 through any suitable support means, possibly resiliently deformable means, known per se and not shown in order to simplify the drawing.
  • the speaker system according to this invention further comprises extremely rigid and therefore distortion-free partition means 16 disposed inside the cabinet 1 and forming therein a chamber 17 for channelling the air between the rear face 18 of membrane 13 and the second aperture 8.
  • the partition means 16 are also of revolution about the axis 3 and consist of any suitable rigid material, notably plastics, capable of imparting the desired rigidity thereto. Thus, these partition means 16 are not liable to be vibrated by acoustic resonance during the operation of the speaker enclosure.
  • the partition means 16 are rigidly supported by the cabinet 1 through the medium of any suitable support means 19 such as distance-pieces shown only diagrammatically in the drawing.
  • the partition means 16 are air-tight, which means that the air is positively caused to flow along the chamber 17, without any possibility of producing acoustic or sound short-circuits, as shown by the arrows f.
  • the chamber 17 may fill completely the volume of the cabinet 1, i.e. the complete cavity defined by this cabinet 1 is shaped by the partition means 16 to constitute said chamber 17.
  • the chamber 17 comprises a plurality of successive compartments and to this end the partition means 16 are made of several sections.
  • the partition means 16 comprise a pair of cylinders, i.e. an outer cylinder 20 and an inner cylinder 21 disposed coaxially to the common axis 3.
  • the outer cylinder 20 comprises a cylindrical lateral surface 22 and a bottom 23 at the rear end of its lateral surface 22.
  • the latter at its front end, is adjacent to the front a 6, at the location or in close proximity of the edge 10.
  • the lateral surface 22 has a radius equal or close to R 2 and is adjacent to the lateral surface 4 of the cabinet 1.
  • the bottom 23 is spaced transversely from the bottom 5 of cabinet 1 by a distance D 1 and lies in general in the central portion of this cabinet 1 at a location calculated for providing the predetermined acoustic impedances of the various compartments constituting the chamber 17.
  • a central circular aperture 24 of radius R 5 is formed through the bottom 23 and this aperture 24 has tightly fitted therein the lateral surface 25 of the inner cylinder 21 open partially or completely at its front and rear ends by corresponding apertures 26 and 27.
  • the radius R 5 is considerably smaller than radius R 2 and possibly smaller than radius R 1 . Consequently, the lateral surface 25 is considerably spaced from lateral surface 22 and encloses the bottom 23, as already explained, so that the apertures 26 and 27 lie on either side of this bottom 23. However, the lateral surface 25 projects essentially forwardly of the bottom 23, that is, within the outer cylinder 20, and a shorter portion of cylinder 21 projects from the rear face of bottom 23, between this bottom 23 and the bottom 5 of cabinet 1. In any case, the rear aperture 27 is spaced from the bottom 5 by a distance D 2 such as to impart a specific acoustic impedance to the various compartments formed in the channelling chamber 17.
  • the front aperture 26 of inner cylinder 21 is also spaced transversely from aperture 7 by a distance D 3 capable of imparting a specific acoustic impedance to said compartments.
  • the front aperture 26 is substantially coincident with, or in close vicinity of, the moving element 12 of speaker 2.
  • the partition means 16 consisting of cylinders 20 and 21 form a chamber 17 divided into several successive sections, namely in the downstream direction between the membrane 13 (more particularly the rear face 18 thereof) and the second aperture 8: a first large resonance chamber 28, a tuning tunnel 29, a second large resonance chamber 30, and a decompression vent passage 31.
  • the first large resonance chamber 28 has a generally cylindrical configuration with an annular base, and is bound at the front by the front wall 6, at the rear by the bottom 23 and laterally by the surfaces 22 and 25. This chamber 28 is closely adjacent to the membrane 13 and lies on the side of the rear face 18 thereof. The first chamber 28 communicates through the aperture 26 with the tuning tunnel 29.
  • This tuning tunnel 29 has a substantially cylindrical general configuration bound laterally by the surface 25. This tuning tunnel 29 communicates through the aperture 27 with the second large chamber 30.
  • the second large chamber 30 has the complex configuration shown in FIG. 1 and is bound at the rear by the bottom 5 and at the front by the bottom 23 and the endmost rear portion of the lateral surface 25, and laterally by the endmost rear portion of the lateral wall 4.
  • This second large chamber 30 communicates with the vent annular passage 31 through the annular space 32 existing between the bottom 23 and the lateral surface 22 of lateral wall 4.
  • vent passage 31 has the shape of a relatively thin cylindrical passage having an annular base and is bound by the lateral face 22 and the foremost end portion of lateral wall 4. As already mentioned hereinabove, the vent passage 31 opens at the level of the second aperture 8.
  • the above-described speaker enclosure is of the open type, not of the closed type, since it comprises not only the conventional aperture 7 but also a second aperture 8.
  • the speaker enclosure according to this invention is also of the unidirectional type since the sound is emitted coaxially through the second aperture 8, in the same sense as, and in close vicinity of, the main sound emission produced through the first aperture 7.
  • the provision of simple, light-weight partition means 16 constitutes a positive advantage when considering the weight, cumbersomeness and cost factors of the speaker enclosure.
  • the channelling chamber 17 comprising a plurality of successive compartments having specific sound impedances is capable of delaying the emission of the backward wave with respect to the forward wave, notably with a lag of the order of one wavelength of the critical emission frequency, and this constitutes a factor capable of improving considerably the acoustic quality of the speaker enclosure, especially in the low-frequency range.
  • the construction of the speaker enclosure in the form of revolution illustrated makes it possible to use this enclosure for multifarious purposes while preserving its moderate overall dimensions and weight in conjunction with a sound styling. With a speaker enclosure of the type described hereinabove it is unnecessary to line the inner walls with sound-damping or padding material, in contrast to many prior art enclosure constructions. On the contrary, in the case of the present invention, such padding should preferably be avoided.
  • the fact that the chamber 17 is open and that the first chamber 28 has a sufficiently large volume affords an adequate damping of the speaker membrane 13, that is, a damping which is neither too strong not too weak.

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Gyroscopes (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
US06/066,539 1978-08-16 1979-08-15 Unidirectional speaker enclosure Expired - Lifetime US4298087A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7823848A FR2433879A1 (fr) 1978-08-16 1978-08-16 Enceinte acoustique unidirectionnelle
FR7823848 1978-08-16

Publications (1)

Publication Number Publication Date
US4298087A true US4298087A (en) 1981-11-03

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ID=9211824

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/066,539 Expired - Lifetime US4298087A (en) 1978-08-16 1979-08-15 Unidirectional speaker enclosure

Country Status (6)

Country Link
US (1) US4298087A (fr)
EP (1) EP0008274B1 (fr)
AT (1) ATE4405T1 (fr)
DE (1) DE2966021D1 (fr)
ES (1) ES483380A1 (fr)
FR (1) FR2433879A1 (fr)

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440260A (en) * 1981-02-03 1984-04-03 Jamo Hi-Fi A/S Bass-reflex loudspeaker system
US4924964A (en) * 1989-07-24 1990-05-15 Olsen Michael P Loudspeaker enclosure
US4949386A (en) * 1988-05-23 1990-08-14 Hill Amel L Speaker system
US5189706A (en) * 1989-01-23 1993-02-23 Yamaha Corporation Acoustic apparatus
US5191177A (en) * 1991-06-27 1993-03-02 Chi Yang H Tube speaker
US5321756A (en) * 1990-03-23 1994-06-14 Patterson Jr James K Loudspeaker system with sonically powered drivers and centered feedback loudspeaker connected thereto
US5359664A (en) * 1992-03-31 1994-10-25 Richard Steuben Loudspeaker system
GB2310104A (en) * 1996-02-12 1997-08-13 Yang Yi Fu Loud speaker enclosure and tunable audio reproduction apparatus
US5824969A (en) * 1996-09-30 1998-10-20 Takenaka; Masaaki Speaker system with a three-dimensional spiral sound passage
US6062339A (en) * 1995-11-27 2000-05-16 Hathaway; Dana B. Compact spiral cavity loudspeaker enclosure
US6144751A (en) * 1998-02-24 2000-11-07 Velandia; Erich M. Concentrically aligned speaker enclosure
US6345685B1 (en) 2000-01-26 2002-02-12 Leigh D. Wells Loudspeaker system
US6634455B1 (en) * 1996-02-12 2003-10-21 Yi-Fu Yang Thin-wall multi-concentric sleeve speaker
US20040142731A1 (en) * 2003-01-21 2004-07-22 San-Chi Ho Speaker module design
WO2005072005A1 (fr) 2004-01-23 2005-08-04 Creative Technology Ltd Haut-parleur a extension acoustique montee de maniere externe
US20070144826A1 (en) * 2005-12-28 2007-06-28 Lg Electronics Inc. Speaker
US20070256888A1 (en) * 2004-05-12 2007-11-08 Tbi Audio Systems Llc Speaker System With Improved Frequency Response
US20070261911A1 (en) * 2006-05-15 2007-11-15 George Nichols Transducer enclosure
WO2008002990A2 (fr) * 2006-06-28 2008-01-03 Bouvier Peter M Haut-parleur à ligne de transmission coaxiale repliée
US20090211840A1 (en) * 2008-02-23 2009-08-27 Peigen Jiang Loudspeaker Enclosure
DE102009008376A1 (de) * 2009-02-11 2010-08-12 Sennheiser Electronic Gmbh & Co. Kg Hörer
US20110075877A1 (en) * 2009-09-29 2011-03-31 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd Portable sound box
EP2373053A1 (fr) * 2010-03-25 2011-10-05 Chao-Lang Wang Structure de boîte sonore réflective de type à radiation audio
US20110243359A1 (en) * 2010-03-31 2011-10-06 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Speaker system with subwoofer
CN104811873A (zh) * 2014-12-23 2015-07-29 北京太和开元科技有限公司 发声装置
RU2601515C2 (ru) * 2012-06-07 2016-11-10 ДжейДиЭй ТЕКНОЛОДЖИ ЭлЭлСи Снабженные проходными отверстиями корпуса аудио динамика
US20170026739A1 (en) * 2015-07-24 2017-01-26 JVC Kenwood Corporation Speaker and headphone device
US9854353B2 (en) * 2015-05-28 2017-12-26 Tymphany Hong Kong Ltd. Omni-directional ported speaker
US10405084B2 (en) * 2017-08-30 2019-09-03 Bose Corporation Loudspeaker with deflector at a port exit
US10499129B2 (en) * 2016-06-15 2019-12-03 Ecri Electronic Sound reproduction or processing equipment with interchangeable cladding
US20200100021A1 (en) * 2018-09-24 2020-03-26 Apple Inc. Acoustic chambers damped with side-branch resonators, and related systems and methods
US11330364B1 (en) 2021-01-12 2022-05-10 Robert Bosch Gmbh Ported speaker assembly
WO2024065623A1 (fr) * 2022-09-30 2024-04-04 Harman International Industries, Incorporated Conception de cavité acoustique pour enceintes de haut-parleur
WO2024087006A1 (fr) * 2022-10-25 2024-05-02 深圳市韶音科技有限公司 Haut-parleur
US11991497B1 (en) * 2022-10-28 2024-05-21 xMEMS Labs, Inc. Acoustic device and holder flattening frequency response

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040281A1 (fr) * 1980-05-20 1981-11-25 Lady Bea Enterprises, Inc. Système de haut-parleur et d'enceinte avec un réseau de recouvrement déphaseur codeur numérique et un système autonome numérique de puissance et une méthode modulaire d'utilisation d'unités d'insertion moulées
US4567959A (en) * 1985-04-10 1986-02-04 Prophit David A Speaker adapted to corner-loaded installation
JPH0450718Y2 (fr) * 1986-02-28 1992-11-30
GB2245798B (en) * 1990-06-29 1994-06-15 Tsao Ye Ming Extensible acoustic enclosure

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AU109966A (en) * 1965-02-18 1967-08-03 Imperial Chemical Industries Limited Polymeric coating compositions
US3638753A (en) * 1970-08-31 1972-02-01 Paul E Cunningham Barrel speaker enclosure

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FR843643A (fr) * 1938-03-12 1939-07-06 Materiel Telephonique Translateurs d'énergie électrique en énergie acoustique et dispositions y relatives
US3122215A (en) * 1962-02-05 1964-02-25 Eugene E Sutton Resonant, acoustical booster with air damping
US3327808A (en) * 1965-06-10 1967-06-27 Dyna Empire Inc Loud speaker housing
FR2127283A5 (fr) * 1971-03-03 1972-10-13 Farrache Jean

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU109966A (en) * 1965-02-18 1967-08-03 Imperial Chemical Industries Limited Polymeric coating compositions
US3638753A (en) * 1970-08-31 1972-02-01 Paul E Cunningham Barrel speaker enclosure

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440260A (en) * 1981-02-03 1984-04-03 Jamo Hi-Fi A/S Bass-reflex loudspeaker system
US4949386A (en) * 1988-05-23 1990-08-14 Hill Amel L Speaker system
US5189706A (en) * 1989-01-23 1993-02-23 Yamaha Corporation Acoustic apparatus
US4924964A (en) * 1989-07-24 1990-05-15 Olsen Michael P Loudspeaker enclosure
US5321756A (en) * 1990-03-23 1994-06-14 Patterson Jr James K Loudspeaker system with sonically powered drivers and centered feedback loudspeaker connected thereto
US5191177A (en) * 1991-06-27 1993-03-02 Chi Yang H Tube speaker
US5359664A (en) * 1992-03-31 1994-10-25 Richard Steuben Loudspeaker system
US6062339A (en) * 1995-11-27 2000-05-16 Hathaway; Dana B. Compact spiral cavity loudspeaker enclosure
US6634455B1 (en) * 1996-02-12 2003-10-21 Yi-Fu Yang Thin-wall multi-concentric sleeve speaker
GB2310104A (en) * 1996-02-12 1997-08-13 Yang Yi Fu Loud speaker enclosure and tunable audio reproduction apparatus
US5824969A (en) * 1996-09-30 1998-10-20 Takenaka; Masaaki Speaker system with a three-dimensional spiral sound passage
US6144751A (en) * 1998-02-24 2000-11-07 Velandia; Erich M. Concentrically aligned speaker enclosure
US6345685B1 (en) 2000-01-26 2002-02-12 Leigh D. Wells Loudspeaker system
US20040142731A1 (en) * 2003-01-21 2004-07-22 San-Chi Ho Speaker module design
US7263387B2 (en) * 2003-01-21 2007-08-28 High Tech Computer, Corp. Speaker module design
EP1709832A4 (fr) * 2004-01-23 2009-03-25 Creative Tech Ltd Haut-parleur a extension acoustique montee de maniere externe
WO2005072005A1 (fr) 2004-01-23 2005-08-04 Creative Technology Ltd Haut-parleur a extension acoustique montee de maniere externe
EP1709832A1 (fr) * 2004-01-23 2006-10-11 Creative Technology Ltd. Haut-parleur a extension acoustique montee de maniere externe
US20070256888A1 (en) * 2004-05-12 2007-11-08 Tbi Audio Systems Llc Speaker System With Improved Frequency Response
US7575095B2 (en) * 2005-12-28 2009-08-18 Lg Electronics Inc. Speaker
US20070144826A1 (en) * 2005-12-28 2007-06-28 Lg Electronics Inc. Speaker
US20070261911A1 (en) * 2006-05-15 2007-11-15 George Nichols Transducer enclosure
US7436972B2 (en) * 2006-06-28 2008-10-14 Bouvier Peter M Folded coaxial transmission line loudspeaker
WO2008002990A2 (fr) * 2006-06-28 2008-01-03 Bouvier Peter M Haut-parleur à ligne de transmission coaxiale repliée
US20080317273A1 (en) * 2006-06-28 2008-12-25 Bouvier Peter M Folded coaxial transmission line loudspeaker
WO2008002990A3 (fr) * 2006-06-28 2008-10-09 Peter M Bouvier Haut-parleur à ligne de transmission coaxiale repliée
US20080000715A1 (en) * 2006-06-28 2008-01-03 Bouvier Peter M Folded coaxial transmission line loudspeaker
US7925036B2 (en) 2006-06-28 2011-04-12 Bouvier Peter M Folded coaxial transmission line loudspeaker
US20110158447A1 (en) * 2006-06-28 2011-06-30 Bouvier Peter M Folded coaxial transmission line loudspeaker
US20090211840A1 (en) * 2008-02-23 2009-08-27 Peigen Jiang Loudspeaker Enclosure
DE102009008376A1 (de) * 2009-02-11 2010-08-12 Sennheiser Electronic Gmbh & Co. Kg Hörer
WO2010092118A1 (fr) 2009-02-11 2010-08-19 Sennheiser Electronic Gmbh & Co. Kg Écouteur
US8971545B2 (en) 2009-02-11 2015-03-03 Sennheiser Electronic Gmbh & Co. Kg Earpiece
US8351641B2 (en) * 2009-09-29 2013-01-08 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Portable sound box
US20110075877A1 (en) * 2009-09-29 2011-03-31 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd Portable sound box
CN102348140A (zh) * 2010-03-25 2012-02-08 王肇朗 音频放射性的反射式音箱结构
EP2373053A1 (fr) * 2010-03-25 2011-10-05 Chao-Lang Wang Structure de boîte sonore réflective de type à radiation audio
US20110243359A1 (en) * 2010-03-31 2011-10-06 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Speaker system with subwoofer
US8428291B2 (en) * 2010-03-31 2013-04-23 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Speaker system with subwoofer
RU2601515C2 (ru) * 2012-06-07 2016-11-10 ДжейДиЭй ТЕКНОЛОДЖИ ЭлЭлСи Снабженные проходными отверстиями корпуса аудио динамика
CN104811873A (zh) * 2014-12-23 2015-07-29 北京太和开元科技有限公司 发声装置
US9854353B2 (en) * 2015-05-28 2017-12-26 Tymphany Hong Kong Ltd. Omni-directional ported speaker
US20170026739A1 (en) * 2015-07-24 2017-01-26 JVC Kenwood Corporation Speaker and headphone device
US9980037B2 (en) * 2015-07-24 2018-05-22 JVC Kenwood Corporation Speaker and headphone device
US10499129B2 (en) * 2016-06-15 2019-12-03 Ecri Electronic Sound reproduction or processing equipment with interchangeable cladding
US10405084B2 (en) * 2017-08-30 2019-09-03 Bose Corporation Loudspeaker with deflector at a port exit
US20200100021A1 (en) * 2018-09-24 2020-03-26 Apple Inc. Acoustic chambers damped with side-branch resonators, and related systems and methods
US11265645B2 (en) * 2018-09-24 2022-03-01 Apple Inc. Acoustic chambers damped with side-branch resonators, and related systems and methods
US11330364B1 (en) 2021-01-12 2022-05-10 Robert Bosch Gmbh Ported speaker assembly
WO2024065623A1 (fr) * 2022-09-30 2024-04-04 Harman International Industries, Incorporated Conception de cavité acoustique pour enceintes de haut-parleur
WO2024087006A1 (fr) * 2022-10-25 2024-05-02 深圳市韶音科技有限公司 Haut-parleur
US11991497B1 (en) * 2022-10-28 2024-05-21 xMEMS Labs, Inc. Acoustic device and holder flattening frequency response

Also Published As

Publication number Publication date
FR2433879A1 (fr) 1980-03-14
ES483380A1 (es) 1980-06-16
EP0008274A1 (fr) 1980-02-20
DE2966021D1 (en) 1983-09-08
EP0008274B1 (fr) 1983-08-03
ATE4405T1 (de) 1983-08-15
FR2433879B1 (fr) 1983-10-28

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